Vulnerability in Microsoft Windows 10 Version 1607
CVE-2026-87705
Improper verification of source of a communication channel in Windows Hyper-V allows an unauthorized attacker to bypass a security feature over an adjacent network.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Microsoft Windows 10 Version 1607
- Microsoft Windows 10 Version 1809
- Microsoft Windows 10 Version 21h2
- Microsoft Windows 10 Version 22h2
- Microsoft Windows 11 Version 23h2
- Microsoft Windows 11 Version 24h2
- Microsoft Windows 11 Version 25h2
- Microsoft Windows 11 Version 26h1
- Microsoft Windows 11 Version 26h2
- Microsoft Windows Server 2012
Weakness classification (CWE)
References
- msrc.microsoft.com/update-guide/vulnerability/CVE-2026-87705 (vendor-advisory, patch)
Frequently asked questions
- What is CVE-2026-87705?
- CVE-2026-87705 is a high-severity vulnerability in Microsoft Windows 10 Version 1607, classified under Improper Verification of Source of a Communication Channel. CVSS score: 7.4/10. Published 2026-10-13.
- How severe is CVE-2026-87705?
- High severity. CVSS v3 base score is 7.4 out of 10.